I got very, very lucky. One of the old 70's minoltas I rescued from craigslist turned out to be a worthless camera / worthless 70-210 / worthless 50 f1.7, but the strap was AWESOME. It's a fairly normal looking 70's brown leather thing, fairly narrow and VERY plain. What makes it so good is that it has two leads that stay on the camera, each of which is about 5 inches long or so. I am constantly taking my strap off and on, because I sometimes want to walk around with the bag (smallish domke), and sometimes just want the camera on. This design has some perks...
1. Having those leads on the camera means I can use one single strap for both the camera AND its bag. I use it on the bag to get places, and then if I don't feel like shooting out of the bag I stash it and click the strap off the bag and onto the camera. I've done the same with the Domke's strap, which worked ok, but I didn't like how wide it was, or the grippiness of it, since I sling the camera around me diagonally... it needs to slide around my shirt up and down between shots.
2. Having the leads also means being able to detach in seconds, and no scraping or scratching the camera.
3. Coolest part = the leads are actually loops of leather that are riveted halfway, and I've found that I can put my right pinky into the right lead as I hand hold the camera with no strap. That means the right lead is acting as a wrist strap of sorts -- as a safety measure, if I were to lose my grip and drop the XT, it would be dangling from my pinky. I often do it on purpose. I just let go of the camera if I need my right hand, and it dangles.
4. Side Note: I did have to loop the left lead around on itself to shorten it, since it tended to dangle over onto the lens barrel if I rotated the camera into portrait. I just doubled it back onto itself and anchored both ends onto the camera lug, and the strap clicks onto it too.
So I don't know if any modern straps offer detachable leads like that, but they're now indispensable for me. Flicking back and forth from strap to no strap, WHILE having a built-in "wrist strap" (actually a pinky strap but serves the same insurance purpose) is a biggie.